RecyclerView 无限循环

实现相对而言无限个Item（无限个数据）

只需要在RecyclerView.Adapter的方法中

@Override
public int getItemCount() {
    return Integer.MAX_VALUE;
}

实现第一次显示的时候, 就可以左滑

在添加完数据后调用RecyclerView.scrollToPosition（），将RecyclerView当前显示的首个Item的position设置为比较大的值。

mRecyclerView.scrollToPosition(mPersonAdapter.getItemRawCount() * 500);

滑动的时候, 一个一个的滑动(类似ViewPager的效果)

new PagerSnapHelper().attachToRecyclerView(mRecyclerView);

全篇代码

    import android.content.Context;
    import android.os.Build;
    import android.support.annotation.Nullable;
    import android.support.annotation.RequiresApi;
    import android.support.v4.content.ContextCompat;
    import android.support.v7.widget.DividerItemDecoration;
    import android.support.v7.widget.LinearLayoutManager;
    import android.support.v7.widget.RecyclerView;
    import android.util.AttributeSet;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.LinearLayout;
    
    import com.zy.policyplatform.R;
    import com.zy.policyplatform.bean.Policy;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * <pre>
     * author : Haitao
     * e-mail : http://blog.nhtzj.com
     * time   : 2018/2/25
     * desc   : 牛人榜单 横向无限滑动
     * version: 2.0
     * </pre>
     */
    public class ProfitPersonView extends LinearLayout {
    
        private RecyclerView mRecyclerView;
        private PersonAdapter mPersonAdapter;
    
        private OnClickListener mItemClickListener;
        private OnItemClickListener onItemClickListener;
    
        public ProfitPersonView(Context context) {
            super(context);
            init(context);
        }
    
        public ProfitPersonView(Context context, @Nullable AttributeSet attrs) {
            super(context, attrs);
            init(context);
        }
    
        public ProfitPersonView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            init(context);
        }
    
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        public ProfitPersonView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
            super(context, attrs, defStyleAttr, defStyleRes);
            init(context);
        }
    
        private void init(Context context) {
            setOrientation(LinearLayout.VERTICAL);
            LayoutInflater.from(context).inflate(R.layout.view_home_person, this, true);
            mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
            mRecyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
            DividerItemDecoration itemDecoration = new DividerItemDecoration(context, DividerItemDecoration.HORIZONTAL);
            itemDecoration.setDrawable(ContextCompat.getDrawable(context, R.drawable.shape_recycleview_divider_vertical));
            mRecyclerView.addItemDecoration(itemDecoration);
            mPersonAdapter = new PersonAdapter(context);
            mRecyclerView.setAdapter(mPersonAdapter);
    
            initListener();
        }
    
        private void initListener() {
            mItemClickListener = new OnClickListener() {
                @Override
                public void onClick(int position, long itemId) {
                    if (onItemClickListener != null) {
                        onItemClickListener.onItemClick(position % mPersonAdapter.getItemRawCount(), itemId);
                    }
                }
    
            };
    
        }
    
        public void setDatas(List<Policy> datas) {
            if (mPersonAdapter == null) {
                return;
            }
            mPersonAdapter.clear();
            if (datas != null && datas.size() > 0) {
                mPersonAdapter.addAll(datas);
            }
            mRecyclerView.scrollToPosition(mPersonAdapter.getItemRawCount() * 500);
    
        }
    
        private class PersonAdapter extends RecyclerView.Adapter {
    
            private List<Policy> mItems;
            private Context mContext;
            private LayoutInflater mInflater;
    
            public PersonAdapter(Context context) {
                mContext = context;
                mInflater = LayoutInflater.from(context);
                mItems = new ArrayList<>();
            }
    
            @Override
            public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                ItemViewHolder viewHolder = new ItemViewHolder(mInflater.inflate(R.layout.item_home_person, parent, false));
                viewHolder.itemView.setTag(viewHolder);
                viewHolder.itemView.setOnClickListener(mItemClickListener);
                return viewHolder;
            }
    
            @Override
            public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    //            onBindLoopViewHolder(holder, position % getItemRawCount());
            }
    
            @Override
            public int getItemCount() {
                int rawCount = getItemRawCount();
                if (rawCount > 0) {
                    return Integer.MAX_VALUE;
                }
                return 0;
            }
    
            /**
             * 真实数据的大小
             */
            public int getItemRawCount() {
                return mItems == null ? 0 : mItems.size();
            }


​    
            public void addAll(List<Policy> items) {
                if (items != null) {
                    this.mItems.addAll(items);
                    notifyItemRangeInserted(this.mItems.size(), items.size());
                }
            }
    
            public final void clear() {
                this.mItems.clear();
                notifyDataSetChanged();
            }


​    
            private class ItemViewHolder extends RecyclerView.ViewHolder {
                public ItemViewHolder(View itemView) {
                    super(itemView);
                }
            }
        }
    
        /**
         * 可以共用同一个listener，相对高效
         */
        public abstract class OnClickListener implements View.OnClickListener {
            @Override
            public void onClick(View v) {
                RecyclerView.ViewHolder holder = (RecyclerView.ViewHolder) v.getTag();
                onClick(holder.getAdapterPosition(), holder.getItemId());
            }
    
            public abstract void onClick(int position, long itemId);
        }
    
        /**
         *外部调用，添加点击回调
         */
        public interface OnItemClickListener {
            void onItemClick(int position, long itemId);
        }
    
        public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
            this.onItemClickListener = onItemClickListener;
        }
    }

RecyclerView分割线请查看RecyclerView-简单设置分割线